CALIBER: Full Auto Rated for Pistol Calibers up-to 9mm and 300BLK Subsonic. – DIAMETER: 1.37 – LENGTH: Standard Configuration: 7.8 Short Configuration: 4.85 – WEIGHT: Standard Configuration: 12.7oz; Short Configuration: 8.7oz – FINISH: Hard Coat Anodized and fully Cerokoted – MATERIALS: – Baffles: 17-4 Stainless Steel – Tube: Hard Coat Anodized Aluminum – Mount: 17-4 Stainless Steel – Finish: High Temp Cerakote (over the entire suppressor) – INCLUDES: – 1/2×28 piston – 9mm Front Cap – Obsidian 9 Suppressor – ADAPT Module – Operator’s Manual – Obsidian Logo Sticker